Joseph Thomas Deal (November 19, 1860 – March 7, 1942) was an American businessman and politician who served four terms as a U.S. Representative from Virginia from 1921 to 1929.

Born near Surry, Virginia, Deal attended the public schools.

He engaged in civil engineering and lumber manufacturing in Surry County, Virginia in 1883.

He served as member of the Virginia House of Delegates during the period 1910–1912.

He resumed his activities in the lumber business until his death in Norfolk, Virginia, on March 7, 1942.